66703707 has 24 divisors (see below), whose sum is σ = 112679424. Its totient is φ = 37228464.

The previous prime is 66703691. The next prime is 66703709. The reversal of 66703707 is 70730766.

It is not a de Polignac number, because 66703707 - 2⁴ = 66703691 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66703709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9603 + ... + 15020.

It is an arithmetic number, because the mean of its divisors is an integer number (4694976).

Almost surely, 2^66703707 is an apocalyptic number.

66703707 is a deficient number, since it is larger than the sum of its proper divisors (45975717).

66703707 is a wasteful number, since it uses less digits than its factorization.

66703707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24679 (or 24676 counting only the distinct ones).

The product of its (nonzero) digits is 37044, while the sum is 36.

The square root of 66703707 is about 8167.2337422165. The cubic root of 66703707 is about 405.5552147311. Note that the first 3 decimals are identical.

The spelling of 66703707 in words is "sixty-six million, seven hundred three thousand, seven hundred seven".